[FriendsImpl] update java wrapper to add function getVcardToString from friend

coreapi/linphonecore_jni.cc

@@ -4284,6 +4284,15 @@ extern "C" jobject Java_org_linphone_core_LinphoneFriendImpl_getCore(JNIEnv*  en
 	return NULL;
 }
 
+extern "C" jstring Java_org_linphone_core_LinphoneFriendImpl_getVcardToString(JNIEnv*  env
+																		,jobject  thiz
+																		,jlong ptr) {
+	LinphoneFriend *lf = (LinphoneFriend*)ptr;
+	LinphoneVcard *lvc = linphone_friend_get_vcard(lf);
+	const char* vcard = linphone_vcard_as_vcard4_string(lvc);
+	return vcard ? env->NewStringUTF(vcard) : NULL;
+}
+
 extern "C" jobject Java_org_linphone_core_LinphoneFriendListImpl_getCore(JNIEnv*  env
 																		,jobject  thiz
 																		,jlong ptr) {

java/common/org/linphone/core/LinphoneFriend.java

@@ -165,6 +165,12 @@ public interface LinphoneFriend {
 	 * @return The reference key of the friend.
 	 **/
 	String getRefKey();
+
+/**
+	 * return a the string value of the vcard corresponding to the given friend
+	 */
+	String getVcardToString();
+
 	/**
 	 * Set a name for this friend
 	 * @param name

java/impl/org/linphone/core/LinphoneCoreImpl.java

@@ -195,7 +195,7 @@ class LinphoneCoreImpl implements LinphoneCore {
 	private native Object createFriend(long nativePtr);
 	private native Object createFriendWithAddress(long nativePtr, String address);
 	private native int getIncomingTimeout(long nativePtr);
-
+	
 	LinphoneCoreImpl(LinphoneCoreListener listener, File userConfig, File factoryConfig, Object userdata) throws IOException {
 		mListener = listener;
 		String user = userConfig == null ? null : userConfig.getCanonicalPath();

java/impl/org/linphone/core/LinphoneFriendImpl.java

@@ -40,6 +40,7 @@ public class LinphoneFriendImpl implements LinphoneFriend, Serializable {
 	private native Object getCore(long ptr);
 	private native void setRefKey(long nativePtr, String key);
 	private native String getRefKey(long nativePtr);
+	private native String getVcardToString(long nativePtr);
 	
 	private Object userdData;
 	public Object getUserData() {
@@ -141,6 +142,12 @@ public class LinphoneFriendImpl implements LinphoneFriend, Serializable {
 	public String getRefKey(){
 		return getRefKey(nativePtr);
 	}
+
+
+	public synchronized String getVcardToString() {
+		return getVcardToString(nativePtr);
+	}
+
 	
 	private native void setName(long nativePtr, String name);
 	@Override